<template>
	<div>
		<!-- 面包屑导航区域 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
		  <el-breadcrumb-item>角色列表</el-breadcrumb-item>
		</el-breadcrumb>
		
		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>
				<el-col>
					<el-button type="primary">添加角色</el-button>
				</el-col>
			</el-row>
			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<el-row :class="['bdbottom',i1 === 0 ? 'bdtop' : '','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable
										 @close="removeRightById(scope.row , item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>
							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过for循环嵌套渲染二级权限 -->
								<el-row :class="[i2 === 0 ? '' : 'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
									<el-col :span="6">
										<el-tag type="success" closable
										 @close="removeRightById(scope.row , item2.id)">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>
									<el-col :span="18">
										<el-tag type="warning" 
										v-for="(item3,i3) in item2.children" 
										:key="item3.id" 
										closable
										 @close="removeRightById(scope.row , item3.id)">{{item3.authName}}</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
						
						<!-- <pre>
							{{scope.row}}
						</pre> -->						
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>
		</el-card>
		
		<!-- 分配权限的对话框 -->
		<el-dialog
		  title="分配权限"
		  :visible.sync="setRightDialogVisible"
		  width="50%" @close="setRightDialogClosed">
		  <!-- 树形控件 -->
		 <el-tree :data="rightslist" :props="treeProps" 
		 show-checkbox node-key="id" 
		 default-expand-all :default-checked-keys="defKeys"
		 ref="treeRef"></el-tree>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="setRightDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="allotRights">确 定</el-button>
		  </span>
		</el-dialog>
	</div>
</template>

<script>
	export default{
		data(){
			return{
				//所有角色列表数据
				rolelist:[],
				// 控制分配权限对话框的显示与隐藏
				setRightDialogVisible: false,
				//所有权限的数据
				rightslist:[],
				// 树形控件的属性绑定对象
				treeProps:{
					label:'authName',
					children:'children'
				},
				//默认选中的节点Id值数组
				defKeys:[],
				//当前即将分配权限的id
				roleId:''
			}
		},
		created() {
			this.getRolesList()
		},
		methods:{
			//获取所有角色的列表
			async getRolesList(){
				const {data:res} = await this.$http.get('roles')
				
				if(res.meta.status !==200){
					return this.$message.error('获取角色列表失败！')
				}
				
				this.rolelist = res.data
				console.log(this.rolelist)
			},
			//根据Id删除对应的权限
			async removeRightById(role,rightId){
				//弹框提示用户是否删除
				const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
				          confirmButtonText: '确定',
				          cancelButtonText: '取消',
				          type: 'warning'
				        }).catch(err=>err)
						
						if(confirmResult !=='confirm'){
							return this.$message.info('取消了删除！')
						}
						 const {data: res} = await this.$http.delete
						 (
						 `roles/${role.id}/rights/${rightId}`
						 )
						 
						 if(res.meta.status !== 200){
						 	return this.$message.error('删除权限失败！')
						 }						 
						  //刷新数据列表
						  //this.getRolesList()
						  role.children = res.data
			},
			//展示分配权限的对话框
			async showSetRightDialog(role){
				this.roleId = role.id
				//获取所有权限的数据
				const {data:res} = await this.$http.get('rights/tree')
				if(res.meta.status !== 200){
					return this.$message.error('获取权限数据失败！')
				}	
				//把获取到的权限数据保存到 data 中
				this.rightslist=res.data
				console.log(this.rightslist)
				
				//递归获取三级节点的Id
				this.getLeafKeys(role,this.defKeys)
				
				this.setRightDialogVisible = true
			},
			 //通过递归的形式，获取角色下所有三级权限的id,并保存到 defKeys 数组中
			 getLeafKeys(node,arr){
				 //如果当前node节点不包含children属性，则是三级节点
				 if(!node.children){
					 return arr.push(node.id)
				 }
				 
				 node.children.forEach(item => this.getLeafKeys(item,arr))
			 },
			 //监听分配权限对话框的关闭事件
			 setRightDialogClosed(){
				 this.defKeys=[]
			 },
			 //点击为角色分配权限
			 async allotRights(){
				 const Keys=[
					 ...this.$refs.treeRef.getCheckedKeys(),
					 ...this.$refs.treeRef.getHalfCheckedKeys()
				 ]
				 //console.log(keys)
				 const idStr= Keys.join(',')
				 
				 const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
				 
				 if(res.meta.status !== 200){
				 	return this.$message.error('分配权限失败！')
				 }	
				 this.$message.success('分配权限成功！')
				 this.getRolesList()
				 this.setRightDialogVisible = false
			 }
		}
	}
</script>

<style>
	.el-tag{
		margin: 7px;
	}
	
	.bdtop{
		border-top: 1px solid #eee;
	}
	
	.bdbottom{
		border-bottom: 1px solid #eee;
	}
	
	.vcenter{
		display: flex;
		align-items: center;
	}
</style>
